MCR18ERTJ1R8 Equivalent & Substitute Parts

Part Overview

The MCR18ERTJ1R8 is a 1.8 Ohm ±5% 0.25W thick film chip resistor in 1206 (3216 Metric) package manufactured by Rohm Semiconductor. This part is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and procurement. The resistor is suitable for general-purpose applications requiring low resistance values with standard tolerance and power ratings.

Substiute Parts

MCR18ERTJ1R8

Rohm SemiconductorIn Stock: 3657MCR18ERTJ1R8 Datasheet

Current PartRFQ

RMCF1206JT1R80

Stackpole Electronics IncIn Stock: 14810RMCF1206JT1R80 Datasheet

DirectRFQ

ERJ-8RQF1R8V

Panasonic Electronic ComponentsIn Stock: 15606ERJ-8RQF1R8V Datasheet

UpgradeRFQ

RC1206FR-071R8L

YAGEOIn Stock: 1513105RC1206FR-071R8L Datasheet

UpgradeRFQ

RC1206JR-071R8L

YAGEOIn Stock: 11108RC1206JR-071R8L Datasheet

UpgradeRFQ

RMCF1206FT1R80

Stackpole Electronics IncIn Stock: 36645RMCF1206FT1R80 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the MCR18ERTJ1R8 is determined by the following critical parameters:

• Resistance Value: Must be 1.8 Ohms
• Package / Case: Must be 1206 (3216 Metric) for PCB compatibility
• Power Rating: Must be 0.25W (1/4W) minimum
• Composition: Thick film construction
• Operating Temperature Range: Must support -55°C ~ 155°C
• RoHS Compliance: ROHS3 Compliant

All substitute parts listed meet these core requirements. Tolerance and additional features (such as automotive qualification or moisture resistance) represent upgrade or equivalent options that do not affect basic functional substitution.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Same Tolerance):

• RC1206JR-071R8L (YAGEO): Maintains ±5% tolerance matching the original MCR18ERTJ1R8. Active product status with high inventory availability (11,073 pcs). Moisture-resistant thick film construction. Suitable for direct replacement in non-automotive applications.
• RMCF1206JT1R80 (Stackpole Electronics Inc): Maintains ±5% tolerance. Active product with automotive AEC-Q200 qualification. Recommended for automotive or mission-critical applications requiring enhanced reliability.

Upgraded Tolerance Options (±1%):

• ERJ-8RQF1R8V (Panasonic Electronic Components): Offers improved ±1% tolerance with automotive AEC-Q200 qualification and current sense capability. Active product with strong inventory (15,516 pcs). Suitable for precision applications or automotive designs.
• RC1206FR-071R8L (YAGEO): Provides ±1% tolerance with moisture-resistant construction. Largest inventory availability (1,513,071 pcs). Active product suitable for high-volume production requiring tighter tolerance control.
• RMCF1206FT1R80 (Stackpole Electronics Inc): Offers ±1% tolerance with automotive AEC-Q200 qualification. Highest inventory among Stackpole options (36,546 pcs). Recommended for automotive applications requiring precision.

All substitute parts are ROHS3 compliant, support the full -55°C ~ 155°C operating temperature range, and maintain MSL 1 (Unlimited) moisture sensitivity rating. Selection should be based on tolerance requirements, automotive qualification needs, and supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with ±1% tolerance in place of the ±5% MCR18ERTJ1R8? A: Yes. A ±1% tolerance part is a functional upgrade and will perform within tighter specifications than the original ±5% part. This substitution is valid for any application where the original part was acceptable.

Q: Are all substitute parts compatible with the same PCB footprint? A: Yes. All substitute parts use the 1206 (3216 Metric) package. Physical dimensions vary slightly (length 0.120" to 0.126", width 0.061" to 0.063", height 0.026" to 0.028"), but these variations are within standard PCB design tolerances for 1206 components and do not affect footprint compatibility.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging? A: Cut Tape is supplied in individual strips for manual handling or small-volume assembly. Tape & Reel is supplied on continuous reels for automated pick-and-place equipment. All substitute parts are available in Tape & Reel format, suitable for high-volume manufacturing.

Q: Do I need automotive-qualified parts if my application is not automotive? A: No. Automotive AEC-Q200 qualification is an additional feature that ensures enhanced reliability and testing. For non-automotive applications, standard ROHS3-compliant parts (such as RC1206JR-071R8L) are sufficient.

Q: What is the significance of the temperature coefficient difference (±400ppm/°C vs ±200ppm/°C)? A: Temperature coefficient indicates resistance value drift over temperature range. The original MCR18ERTJ1R8 has ±400ppm/°C; all substitutes have ±200ppm/°C, representing improved temperature stability. This is a performance upgrade with no negative impact on substitution.

Q: Which substitute part has the best inventory availability? A: RC1206FR-071R8L (YAGEO) has the highest inventory at 1,513,071 pcs, followed by RMCF1206FT1R80 (Stackpole) at 36,546 pcs. Both are suitable for high-volume production requirements.